"Other Income" for tax purposes, is "Self-Employment" income from your T4A box 28.
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T4A box 28 is reported on line 130 of your tax return: "Use this line to report taxable income that has not been or should not be reported anywhere else on the return. In the space provided on line 130 of your return, specify the type of income you are reporting."
More here from the CRA: https://bit.ly/2Euffvx
